Wheel loader front unit and a wheel loader

Abstract

The invention provides a wheel loader front unit including a frame, the wheel loader front unit further including two hub supporting elements, each hub supporting element being arranged on opposite sides outside of the frame for supporting a respective hub unit, a lift arm for supporting an implement of the wheel loader, the lift arm being arranged to be pivoted around a pivot connection to the frame by a main hydraulic cylinder, and a tilting hydraulic cylinder arranged to actuate a tilting movement of the implement in relation to the lift arm, wherein the wheel loader front unit further includes a slave hydraulic cylinder hydraulically connected to the tilting hydraulic cylinder for controlling the tilting movement of the implement when the lift arm is pivoted by the main hydraulic cylinder, wherein the slave hydraulic cylinder extends between the lift arm and one of the hub supporting elements.

Description

BACKGROUND AND SUMMARY[0001]The invention relates to a wheel loader front unit, and a wheel loader. The invention is applicable on working machines within the fields of industrial construction machines or construction equipment, in particular wheel loaders.[0002]A working machine, such as a wheel loader, is usually provided with a bucket, container, gripper or other type of implement for digging, carrying and / or transporting a load. For example, a wheel loader has a lift arm unit for raising and lowering the implement. Usually a hydraulic cylinder or a pair of hydraulic cylinders is arranged for raising the lift arm and a further hydraulic cylinder is arranged for tilting the implement relative to the lift arm.[0003]In addition, the working machine is often articulated frame-steered and has a pair of hydraulic cylinders for turning or steering the working machine by pivoting a front unit and a rear unit of the working machine relative to each other. The hydraulic system generally fu...

AI Technical Summary

Benefits of technology

[0004]An articulated frame steered wheel loader will normally be subjected to high loads during operation. To withstand such loads, the amount of material in the structure of the wheel loader may be generously provided, which will result in a relatively heavy wheel loader. A large wheel loader mass will in turn result in an increased fuel consumption as well as increased production costs.

[0021]Preferably, the lift arm is located centrally between the hub supporting elements. Preferably, the main hydraulic cylinder is located centrally between the hub supporting elements. Thereby, a compact and robust design may be provided with a single, centrally located lift arm and a centrally located main hydraulic cylinder, and with slave hydraulic cylinders extending on either side of the lift arm, by-passing the frame.

Problems solved by technology

An articulated frame steered wheel loader will normally be subjected to high loads during operation.

To withstand such loads, the amount of material in the structure of the wheel loader may be generously provided, which will result in a relatively heavy wheel loader.

A large wheel loader mass will in turn result in an increased fuel consumption as well as increased production costs.

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